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Avionics-List Digest Archive
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Total Messages Posted Fri 10/03/03: 1
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Today's Message Index:
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1. 12:59 PM - Re: diy gps annunciator need help please (CardinalNSB@aol.com)
________________________________ Message 1 _____________________________________
Time: 12:59:04 PM PST US
From: CardinalNSB@aol.com
Subject: Avionics-List: Re: diy gps annunciator need help please
--> Avionics-List message posted by: CardinalNSB@aol.com
-------------------------------1065211106
Hello.
I am working on installing a Garmin 300xl gps and don't want to pay for (or
need) the "factory" annunciator panel. I am wiring my cdi directly to the
Garmin, so I don't need the multi pole relay to switch the cdi anyway. However,
to be IFR legal, I do need "lights and switches" which I would like to put
together myself.
The schematic shows that most of the annunciator lights and the "approach"
momentary switch are directly tied into the connector; however, the "auto/hold"
lights and the "auto/hold" selection switch are tied together. The
"auto/hold" function switches between automatically sequencing through the waypoints
or
holding on a specific way point.
The "auto/hold" is laid out such that in the first position the dpdt switch
lights the "auto"annunciator and closes the "auto" circuit, and in the other
position lights the "hold" light and closes the "hold" circuit. That is, this
switch position controls those lights. (It seems odd to me that Garmin would
run the other annunciator lights off of the Garmin unit, that is, the lights
indicate the circuit as the Garmin sees it, whereas the "auto/hold" lights are
lit based on the switch position with no regard to how the Garmin is seeing it)
I would like to make a simple annunciator panel using led's and generic mini
switches (one momentary and one dpdt). Has anybody done anything like this, I
would appreciate any help you can give me on this, what leds to use, etc. I
could use the NAT type of switch but that seems bulky and a little pricey and
I have become enamored with using some led's anyway.
Thank you, Skip Simpson
-------------------------------1065211106
tutf-8">
Hello.
I am working on installing a Garmin 300xl gps and don't want to pay for=
(or need) the "factory" annunciator panel. I am wiring my cdi directl=
y to the Garmin, so I don't need the multi pole relay to switch the cdi anyw=
ay. However, to be IFR legal, I do need "lights and switches" which I=20=
would like to put together myself.
The schematic shows that most of the annunciator lights and the "approa=
ch" momentary switch are directly tied into the connector; however, the "aut=
o/hold" lights and the "auto/hold" selection switch are tied together. =
The "auto/hold" function switches between automatically sequencing through=20=
the waypoints or holding on a specific way point.
The "auto/hold" is laid out such that in the first position the dpdt sw=
itch lights the "auto"annunciator and closes the "auto" circuit, and in the=20=
other position lights the "hold" light and closes the "hold" circuit. =20=
That is, this switch position controls those lights. (It seems odd to me tha=
t Garmin would run the other annunciator lights off of the Garmin unit, that=
is, the lights indicate the circuit as the Garmin sees it, whereas the "aut=
o/hold" lights are lit based on the switch position with no regard to how th=
e Garmin is seeing it)
I would like to make a simple annunciator panel using led's and generic=
mini switches (one momentary and one dpdt). Has anybody done anything=
like this, I would appreciate any help you can give me on this, what leds t=
o use, etc. I could use the NAT type of switch but that seems bulky an=
d a little pricey and I have become enamored with using some led's anyway.&n=
bsp;
Thank you, Skip Simpson
-------------------------------1065211106--